When I am driving at ~60 mph and brake (does not matter how hard or how soft) it starts shaking. The steering vibrates and I have to back off and brake again (almost like pumping non-abs brakes). The vibration is not the ABS coming into action so ABS is out of question.
I have done some research which makes me think it might be rotor warp or excessive heat. I tend to think it's not the heat as at times I brake and have no vibrations at all. most of the times I have noticed if I get off gas and immediately brake vibrations are almost always present. If I am off the gas for few seconds or more and then brake the vibrations are less apparent or not present at all.
I am going to take it to GM service station at my dealer (where I always go) but I wanted to run it by people here if anyone else is having same issue on their G6.
I appreciate ll help.